| 4501 | Texas Ind. Exploration, Inc. | | Oil & Gas Operator | Oct 2001 |
| 4502 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 4503 | Texas Meridian Res. Expl., Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1998 |
| 4504 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 4505 | Texas Pacific Oil Co. | | Oil & Gas Operator | Dec 1980 |
| 4506 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Sep 2026 |
| 4507 | Texas T Oil Co. | | Oil & Gas Operator | Apr 1990 |
| 4508 | Texasgulf Inc. | Newgulf, TX 77462 | Oil & Gas Operator | Jul 1994 |
| 4509 | Texeast Operating Co., Inc. | Farmers BRNCH, TX 75234 | Oil Operator | Sep 2026 |
| 4510 | Texegy Operating Company LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Dec 2024 |
| 4511 | Texex Petroleum Corporation | | Oil & Gas Operator | Dec 2024 |
| 4512 | Texla Operating Co | Jonesville, TX 75659 | Oil & Gas Operator | Sep 2026 |
| 4513 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 4514 | Texoil Company | | Oil & Gas Operator | Dec 2000 |
| 4515 | Texoma Production Co | | Oil & Gas Operator | Jun 1986 |
| 4516 | Texona Petroleum Corporation | Houston, TX 77084 | Oil & Gas Operator | Aug 2003 |
| 4517 | Texstar Petroleum, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2000 |
| 4518 | TGNR TVL LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 4519 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 4520 | Tharp Operating Company | Houston, TX 77070 | Oil & Gas Operator | Nov 2014 |
| 4521 | The B&B Oil Co Of Sabine Inc | | Oil Operator | Jun 1982 |
| 4522 | The B&C Corp-Imp Amer MGT Co | | Oil & Gas Operator | Aug 1981 |
| 4523 | The Ballard & Cordell Corp | | Oil & Gas Operator | Feb 1982 |
| 4524 | The Bering Company | | Oil Operator | Jul 1979 |
| 4525 | The Cornell Corporation | Ruston, LA 71273 | Oil & Gas Operator | Sep 1993 |
| 4526 | The Exploration Co. Of La, Inc | | Oil & Gas Operator | Nov 1987 |
| 4527 | The George R Brown Partnership | | Oil & Gas Operator | Jun 1992 |
| 4528 | The Goro Corporation | | Oil & Gas Operator | Jul 1978 |
| 4529 | The Harvest Group, LLC | | Oil & Gas Operator | May 2011 |
| 4530 | The Hunter Company, Inc. | | Oil & Gas Operator | Sep 1985 |
| 4531 | The Maurice L. Brown Company | | Oil & Gas Operator | Aug 1987 |
| 4532 | The Meridian Res. & Exp. LLC | | Oil & Gas Operator | Sep 2010 |
| 4533 | The Meridian Resource & Exp Co | | Oil & Gas Operator | Dec 2000 |
| 4534 | The Pioneer | | Gas Operator | Feb 2008 |
| 4535 | The Romanoff Corporation | | Oil & Gas Operator | Nov 1989 |
| 4536 | The Southern Louisiana Expl. Company LLC | | Oil & Gas Operator | Nov 2024 |
| 4537 | The Stone Oil Corporation | | Oil & Gas Operator | May 1985 |
| 4538 | The Stone Petro Corp-Toce Oil | | Oil & Gas Operator | Oct 1984 |
| 4539 | The Superior Oc WM Scully Etal | | Oil & Gas Operator | Apr 1986 |
| 4540 | The Superior Oil Co & Pel-Tex | | Oil & Gas Operator | Apr 1986 |
| 4541 | The Superior Oil Co - Tesoro | | Oil & Gas Operator | Apr 1986 |
| 4542 | The Termo Company | Long Beach, CA 90801 | Oil & Gas Operator | Jul 2026 |
| 4543 | The WM G Helis Company, L.L.C. | | Oil & Gas Operator | Nov 2003 |
| 4544 | Tholl Oil Company | | Oil Operator | Dec 2003 |
| 4545 | Thomas Aitken, Inc. | | Gas Operator | Dec 2024 |
| 4546 | Thomas Bell | | Oil Operator | Dec 1985 |
| 4547 | Thomas C. Hoffpauir | | Oil & Gas Operator | Mar 1991 |
| 4548 | Thomas C. Hoffpauir, Inc. | | Oil & Gas Operator | Jan 1981 |
| 4549 | Thomas E. Slack | | Oil Operator | Mar 2003 |
| 4550 | Thomas G. Easterling | | Oil Operator | Jun 1989 |
| 4551 | Thomas Turman | | Oil & Gas Operator | Dec 1991 |
| 4552 | Thor Production Co. | | Oil Operator | May 1997 |
| 4553 | Thor-Max Operating, Inc. | Plano, TX 75025 | Oil & Gas Operator | Sep 2026 |
| 4554 | Thornton & Brooks, Inc. | | Oil & Gas Operator | Oct 1990 |
| 4555 | Thornton Page Natural Gas | | Oil & Gas Operator | Dec 2024 |
| 4556 | Thrall Texas Oil, LLC | | Oil & Gas Operator | Jan 2025 |
| 4557 | Three "N" One Production | | Oil & Gas Operator | Dec 2011 |
| 4558 | Three D Petroleum LLC | | Oil Operator | Dec 2024 |
| 4559 | Three S & T Oil Co., Inc. | | Oil & Gas Operator | May 1985 |
| 4560 | Three Sisters Investments, LTD | | Oil & Gas Operator | Oct 1989 |
| 4561 | Three Sisters Petroleum, Inc. | Oil City, LA 71061 | Oil & Gas Operator | Jan 2025 |
| 4562 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 4563 | THT Operating Company | | Oil & Gas Operator | Jul 1990 |
| 4564 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 4565 | Tideland Industries, Inc. | | Oil & Gas Operator | Dec 1989 |
| 4566 | Tideway Oil Programs, Inc. | | Oil & Gas Operator | Oct 1980 |
| 4567 | Tierra Petroleum Corp. | | Oil & Gas Operator | Jun 1987 |
| 4568 | Tigco Oil & Gas Co., Inc. | | Oil & Gas Operator | Nov 2014 |
| 4569 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 4570 | Tiger Oil International, Inc | | Oil & Gas Operator | Dec 1978 |
| 4571 | Tiger Petroleum | | Oil Operator | Sep 2002 |
| 4572 | Tigner Walker | | Oil & Gas Operator | Dec 2021 |
| 4573 | Tigner Walker Et Al | | Oil & Gas Operator | Aug 2000 |
| 4574 | Tillman A. Rousse | | Oil Operator | Jan 1990 |
| 4575 | Tillman A. Rousse, Inc. | | Oil Operator | Apr 2001 |
| 4576 | Tillman J. McIntyre | | Oil Operator | Dec 1987 |
| 4577 | Tim Brookover | | Oil & Gas Operator | Dec 2005 |
| 4578 | Time Energy, L.L.C. | | Oil & Gas Operator | Nov 2020 |
| 4579 | Tipco | Shreveport, LA 71104-3047 | Oil & Gas Operator | May 1988 |
| 4580 | Tipco Operating Co. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2026 |
| 4581 | Tipperary Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 4582 | Titan Oil Corp. | | Oil & Gas Operator | Jan 2025 |
| 4583 | Tma Production, LLC | | Oil Operator | Dec 2024 |
| 4584 | TMR Exploration, Inc. | Bossier City, LA 71171 | Oil & Gas Operator | Sep 2025 |
| 4585 | TNC Energy, LLC | Lubbock, TX 79401 | Oil & Gas Operator | Nov 2016 |
| 4586 | Toc, Inc. (TN) | | Oil Operator | Apr 1995 |
| 4587 | Toce Energy, L.L.C. | | Oil & Gas Operator | Dec 2017 |
| 4588 | Toce Oil Company | | Oil & Gas Operator | Dec 2014 |
| 4589 | Todd Bertolet | | Gas Operator | Apr 1999 |
| 4590 | Todd Oil Corp. Of La. Inc. | | Oil & Gas Operator | Jul 2000 |
| 4591 | Todd Oil Production Co | | Oil Operator | Aug 2001 |
| 4592 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Sep 2026 |
| 4593 | Tolar Corporation | | Oil & Gas Operator | Sep 1999 |
| 4594 | Tolar Energy, L.L.C. | | Oil & Gas Operator | Dec 2001 |
| 4595 | Tolbert & Associates | | Oil Operator | Dec 2024 |
| 4596 | Tolbert Et Al | | Oil Operator | Jun 2000 |
| 4597 | Tolbert Well Service | | Oil Operator | Jan 2025 |
| 4598 | Toledo Bend Well Service | | Oil Operator | Aug 2000 |
| 4599 | Tom Brown Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2004 |
| 4600 | Tom Littlepage Oil Properties | | Oil & Gas Operator | Dec 1984 |